299 



edged behind with silvery- white, which shades off gradually into the 

 ground color. The shape of this patch may be thus defined : — With 

 one leg of the compass on the middle of the costa, and with a radius 

 equal to one-fourth of the costa, commence next the base of the wing, 

 and proceed to describe a semi-circle ; as soon as three-fourths of the 

 semi-circular arc is described, draw from that point to the apex of the 

 wing a circular arc of 45°, with its convexity towards the terminal 

 margin, ami connect the sub-costal vein, at the point of conunence- 

 ment, with the base of the wing by a line diverging from the costal 

 edge, so as to double its distance by the time it attains the base of the 

 wing. The whole spot thus constructed has somewhat the shape of 

 the half of a very sharp-pointed acorn, the narrow stripe next the 

 base representing the stalk, the three-fourths of the semi-circular arc 

 the cup, and the arc of 45° the acorn itself Length ? .43 inch. Ex- 

 panse ? 1.19 inch. Length of cocoon .42 inch ; breadth, .31 inch. One 

 ? ; d" unknown. The larva fed on hickory leaves, but I have met 

 with two specimens on the buttonwood or sycamore. The imago did 

 not appear till the following summer. It is possible, but extremely 

 improbable, that I may be mistaken in referring the above imago and 

 cocoon to scapha Harris, as I had some other larv^ in the same jar 

 with that of scapha. 



LiMACODES ? HYALiisrus, n. sp. d Body robust, covered with long, 

 shining, brown-black hairs. Antennse reaching one-third of the way 

 along the costa, pale-brown, widely pectinate at base, the pectinations 

 at base as long as the diameter of the eye, and gradually tapering to 

 nothing at the tip ; palpi concealed by yellowish hairs. Tip of abdo- 

 men with a brush of rufous hairs. Legs dull rufous, mostly covered 

 by long, black hairs, hind femora covered with long, yellowish hairs, 

 and the hind tarsi with rufous ones. Front ivings narrow, three times 

 as long as wide ; hind wings triangular, the costal edge convex, the 

 anal edge straight, the terminal edge very slightly concave, and the 

 apex of the apical and anal angles acute and not rounded off. Disk 

 of all four wings hyahne to the naked eye, but under the lens sparse- 

 ly covered with fine, appressed, short, dusky hairs. Front wings with 

 the veins, a narrow costal and terminal margin, a much wider inte- 

 rior margin, and a small spot at the tip of the discoidal cellule, all 

 opaquely mottled with brown-black and ochre-yellow hair. Hind 

 wings with the veins, a wide costal and interior margin, and a very 

 narrow but definite terminal margin, all opaquely covered with brown- 

 black hair. Length .36 inch. Expanse .70 inch. One d", which . 

 hybernated in the cocoon ; ? unknown. 



The larva is flattish, elongate-oval, of a palish brown color, with 

 about nine pairs of laterally-projecting, flattened appendages, covered 

 with short, dense, velvety hair, arranged along the entire length of 



